Onyx - Brockton Thatcher Landfill Solar CSG
Plymouth County, Massachusetts · EIA plant ID 61727 · Operator: Onyx Asset Services Group
Nameplate4MWSummer 4 MW
Generators1in service
Net generation5GWh12 mo to Dec 2025
Capacity factor15%solar units, summer MW
Heat rate—thermal plants only
First online2017
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), solar units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2017 | 1.6 | 29.0% | — |
| 2018 | 5.3 | 16.4% | — |
| 2019 | 4.5 | 13.9% | — |
| 2020 | 5.4 | 16.5% | — |
| 2021 | 5.6 | 17.3% | — |
| 2022 | 5.9 | 18.3% | — |
| 2023 | 4.3 | 13.2% | — |
| 2024 | 5.1 | 15.6% | — |
| 2025 | 5 | 15.3% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 10238 | Solar Photovoltaic | PV | 3.7 | 3.7 | Nov 2017 | Operating | — | coming soon |
Owner / operator
Operator: Onyx Asset Services Group. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Solar Mission SunE LLC | 100.0% | 4 MW |
Nearby plants
Within 80 km.
| East Bridgewater Solar | 2 MW | 0.7 km |
| Town of East Bridgewater CSG | 2 MW | 2.8 km |
| West Bridgewater AB CSG | 2 MW | 6.2 km |
| Rockland Solar CSG | 2 MW | 7.5 km |
| Ajax Solar, LLC (MA) | 4 MW | 8.1 km |
| Shuman Solar | 2 MW | 8.7 km |